[PATCH 2/3] ftrace: Expose ftrace_hash_empty and ftrace_lookup_ip

[Namhyung Kim <namhyung@kernel.org>]

It will be used when checking graph filter hashes later.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 kernel/trace/ftrace.c | 14 +-------------
 kernel/trace/trace.h  | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 37b0e948d924..0470e373b9b4 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1110,13 +1110,6 @@ struct ftrace_func_entry {
 	unsigned long ip;
 };
 
-struct ftrace_hash {
-	unsigned long		size_bits;
-	struct hlist_head	*buckets;
-	unsigned long		count;
-	struct rcu_head		rcu;
-};
-
 /*
  * We make these constant because no one should touch them,
  * but they are used as the default "empty hash", to avoid allocating
@@ -1192,12 +1185,7 @@ struct ftrace_page {
 static struct ftrace_page	*ftrace_pages_start;
 static struct ftrace_page	*ftrace_pages;
 
-static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
-{
-	return !hash || !hash->count;
-}
-
-static struct ftrace_func_entry *
+struct ftrace_func_entry *
 ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip)
 {
 	unsigned long key;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 1ea51ab53edf..431a39ba8eee 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -787,6 +787,20 @@ extern void __trace_graph_return(struct trace_array *tr,
 				 struct ftrace_graph_ret *trace,
 				 unsigned long flags, int pc);
 
+struct ftrace_hash {
+	unsigned long		size_bits;
+	struct hlist_head	*buckets;
+	unsigned long		count;
+	struct rcu_head		rcu;
+};
+
+struct ftrace_func_entry *
+ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip);
+
+static bool __always_inline ftrace_hash_empty(struct ftrace_hash *hash)
+{
+	return !hash || !hash->count;
+}
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 /* TODO: make this variable */
-- 
2.11.0